Chemistry 9th Edition

by
Zumdahl, Steven S.; Zumdahl, Susan A.

Published by
Cengage Learning

ISBN 10:
1133611095

ISBN 13:
978-1-13361-109-7

Chapter 5 - Gases - Questions: 25

Answer

Helium has the lowest density of the noble gases.

Work Step by Step

The periodic trend for density is that density increases down a group as the increase in atomic mass is much more rapid than the increase in volume. Therefore, the lowest density noble gas would be helium at the top of the noble gas group.